[2.x] Not require Ziggy on ShareInertiaData middleware.

[xiCO2k]

This PR fixes #1023

Removes the addition of Ziggy on the ShareInertiaData middleware, and only add Ziggy to the HandleInertiaData stub if --ssr is passed, so that way if anyone wants to remove, they have the full control.

Thanks,
Francisco

[taylorotwell]

@xiCO2k how will this middleware actually be invoked? where is it registered with the routes?

[xiCO2k]

Yes, the middleware is already added here:

jetstream/src/Console/InstallCommand.php

Line 345 in 05b6781

$this->installMiddlewareAfter('SubstituteBindings::class', '\App\Http\Middleware\HandleInertiaRequests::class');